Air-brush.



P. THOMPSON.

AIR BRUSH. APPLICATION FILED MAR.9,190B.

Patented June 8, 1909 jmn tar 1U T suitcase entrance onnion PETER 'rnonrson, or 'rosonro, ONTARIO, CANADA. f

AIR-BRUSH.

Specification of Letters Patent. Application filed March 9, 1508. Serial No. $20,0e3.

Patented. June 8,-1909.

useful Improvements in Air-Brushes, of

which the following is a specification.

The invention relates to improvements in air brushes'as described in the present specification and illustrated in the accon'ipanying drawii'igs that i orin part of the same.

The invention consists essentially in dis tributing the air in a novel arrangement of chambers adjustable in relation one to the other.

The objects of the invention are to enlarge the range of \YOlltWlllCll can be accon1- piished with the same instrument, to insure an even distribution of the colol; in painting the picture, to simplify and render accurate and positive, the adjustment, and to reduce. the cost of production and provide an in strument easy to clean. i

in the drawings Figure l is-an enlarged sectional perspective view of the invention. Fig. 2 is across sectionalvi'ew through the air chambers and valve.

I and through a suitable orifice Like numerals of reference indicate correspending parts in each figure.

Referring to the drawings, 1 the outer and cylindrical casing having 'a' knurled ring 2 at its inner and open end and sharply converging at the outer end to'the central orifice 3 which is the ope 'ating point of the i instrument. 4 1s a thread formed in the inner wall of the said casing 1.

5 is a valve chamber casing preferably forming part. with the casing 1 and projectin from one side thereof adjacent to the shoulder formed at the beginnin of the taper of the converging end and having a passage ti leading from the chamber 7 and the seat 8 at the entrance of the said chainbcr 7 from the air inlet 9.

10 is an air valve having its stem 11 projected upwardly through the chamber 7 in the said valve chamber casing.

12 is a button surmounting the'valve stem 11, a suitable spiral sprirw encirclin said valve stem between said button 'an said valve chamber casing.

13 is the inner casing and color Well how ing the knurledring '14 t'ormin part therewith at its outer and open en and'at its inner end if) reduced in size and converging to a central orilice it; of similar dimensions than the aforesaid central orifice 3.

l? is an annular groove at the inner end of which the thread 18 is formed on the periphery oi. the said casing 13 through to the shouider formed at'tlie beginning of the said reduced inner end.

11 is an annular rec parting the threads ot the threaded portion adjacent to the duced end 15. and 20 are longitudinal pas sages in the said threaded portion from S21iCl.\ annular recess 19 through to the edge at the beginning of the said reduced portion. The inner casing 15 is introduced into the said outer casing 1, the thread on the inner wall of the said outer casing corresponding" to the thread on the outer wail t the said inner casing, the said inner casii'ig being turned into said outer casing until its point projects through the. orifice 3 and the annuitir recess 19 registers with the passage (3 tit-om the valve cinunher.

l 21 is the adjusting needle having the bow springs 22 extending therefrom and abutting the sides of the inner wall of said inner ceasing to and retaining said needle in acentral position in said casing the pointof said needle being formed preferably with the converging fiat sides 23.

In the operation of this device the inner casing is partially filled with color 0 ink, the point of the needle being so adjusted in relation to the inner converging walls of. the reduced tip of the inner casing as to control the flow through the orifice 16. The valve chamber is connected up to a suitable air supply and the instrument is then ready for use. By pressure on the button- 12 the air flows through the passage 6 into the recess 1.9 and from there distributes itself through the various passages 20 into the space between the reduced end of the inner casing and the end of the outer casing fiow mg through the annular openlng formed by the contiguous Walls of the casing surroundthat the casings strument, the flow of air is reduced and the color drawn from the color cheinher isb iown The needle 21 nnrv be adjusted as desired to control the tiow of color through the orii'ice it and is also adapted to clean the said oritiee it it be omes clogged, the edges formed by the tint faces, cutting out the:

clogged ink or color.

What I claim as my invention is:-

1. In an air brush, a casing forming ink well open at one end and having an ttllbl'tllitilt inner wall extending from said open end and converging to a narrow opening at the opposite end. an outer casing adjustably mounted on said ink well casing and forming an air ehainbcr around the converging end of said ink well casing and converging to an outlet opening surrounding the converging end of said ink Well easing. a valve chainber communicating with said air chamber. and a valve controlling the supply of air to said air chamber.

in an air brush, a casing forming an ink well open at one end and having an unbroken inner wall converging to a narrow opening atthe opposite end and an annular recess in its outer wall adjacent to said tapered portion and coinnntnicating passages leading from said annular reees forwardly an outer casing adjustably mounted Simple allows on 1litl ink well casing and converging to an outlet opening surrouinling the converging end of said ink well casing and forming an air chamber coi'ninunicating with the pasages leading from said annular recess. a valve chamber coutniunieating with said an uular re'ce and a valve controlling the sup pl v of air through said valve chamber.

2}. in an air brush. a c vlindri-al easing having its inner wall extending unbroken from its open end and converging to a narrow circular ink egress opening and its outer "wall threaded tor a portion of its length. said outer wall having an annular reeesa arranged intermediate of the length ol said threaded portion and longitudinal channels; extending from said annular recess to one end of said threaded portion, an outer casing threaded internally corresponding to the threaded outer wall ol' said ink well casing and titting thereon and having its for ward end converging toa narrow outlet opening surrounding the converging end of v said ink well casing. a 'alve chamber rigidl --:ecured to said outer casing having a coniniunieating pas. tge le..dingthroughthe wall of said outer eaang communicating with the annular rec, in the outer wall of said ink well casing. and a value controlling the Puppl v ot air passing through said valve chamber.

Signed at. the city ot' 'loronto. in the county of York. lrovince oi? Ontario. in the Donfinion of Canada. tut: 21 th day of Feb ruary 1908.

Pli'llllt 'llIOMPSON.

r Witnesses i ll. Dnxxiaox, l 7M. U. Mont. 

